Bosch rotary injection pump. Switched to high pressure common rail injection in 2003

High pressure common rail, CP3 injection pump

Aspiration:

Variable Geometry Turbocharger (VGT)

Holset Turbocharger

Variable Geometry Turbocharger (VGT)

Valvetrain:

Overhead cam, 4 valves per cylinder

Overhead valve, 4 valves per cylinder

Overhead valve, 4 valves per cylinder

Weight:

approx. 966 lbs

1,150 lbs (approx.)

835 lbs (approx.)

Peak Horsepower:

325 hp @ 3,300 RPM

325 hp @ 2,900 RPM (high output model)

360 hp @ 3,200 RPM

Peak Torque:

570 lb-ft @ 2,000 RPM

610 lb-ft @ 1,600 RPM (high output model)

650 lb-ft @ 1,600 RPM

Reputation:

Stock torque to yield (TTY) head bolts proved to be a weak link. The overall engine design suffices, though the Power Stroke experienced severe reliability issues. Overall a strong performer with good fuel economy. The Ford TorqShift 5-speed automatic has a positive reputation .

The LBZ is considered the "hot rod" of Duramax diesels due to its power potential with aftermarket tuning and lack of emissions equipment to complicate matters. The Allison 1000 6-speed automatic transmission remained a strong selling point for the Duramax diesel.